I’ve had excellent results using a red-dot gun sight to track moving photo targets.
Yeah, that might not be such a good idea at or near government institutions. Plus, a lot of people may get quite skittish when there’s a red dot pointed at or near them. I don’t want anybody confused for an assassin.
The red-dot sight does not project a laser dot onto the target. It is a “reflex viewer”: a small red-dot is projected on a semi-transparent screen inside the sight (the black cylinder part of the image to the right of “battery”. Looking through the sight, one merely has to keep the dot on the target (which is visible through the semi-transparent screen).
Encyclopedia Galactica: that is a nifty technique! I’m going to have to move equipment from my telescope kit to my camera kit and play around